US20210364862A1 - Backlight module and display device - Google Patents

Backlight module and display device Download PDF

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Publication number
US20210364862A1
US20210364862A1 US16/339,889 US201816339889A US2021364862A1 US 20210364862 A1 US20210364862 A1 US 20210364862A1 US 201816339889 A US201816339889 A US 201816339889A US 2021364862 A1 US2021364862 A1 US 2021364862A1
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US
United States
Prior art keywords
support structure
backlight module
guide plate
light guide
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US16/339,889
Other languages
English (en)
Inventor
Jinmoo PARK
Hanqi CHU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Hefei BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Assigned to BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD. reassignment BOE TECHNOLOGY GROUP CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHU, HANQI, PARK, Jinmoo
Publication of US20210364862A1 publication Critical patent/US20210364862A1/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the present disclosure relates to the field of display technology, and in particular, relates to a backlight module and a display device.
  • a bezel of the backlight module needs to be narrow. That is, a distance from an active display region (an active area (AA)) of a liquid crystal panel to an edge of the backlight module needs to be reduced. Thus, a distance from an edge of the AA region to an edge of a light guide plate is required to be reduced. If the distance is too small, a strong light from a gap between the light guide plate and a mold frame may be seen under a large viewing angle, i.e., a light line under the large viewing angle. Furthermore, a bezel size of a narrow bezel is limited by a mold thickness of the mold frame.
  • a backlight module for providing a light source to a display panel includes a light guide plate including a light-emergent surface; and an optical film and a support structure, arranged at a side of the light-emergent surface of the light guide plate; wherein the support structure is configured to support and fix the display panel.
  • the support structure is a support spacer.
  • an edge of the light guide plate at least partially extends beyond an edge of the optical film, and the support structure is arranged on a portion of the light guide plate that extends beyond the optical film.
  • the support structure is a plastic part made of a hard plastic.
  • the support structure is a polyester resin part made of a polyester resin.
  • the support structure is a light shielding structure having a preset light transmittance.
  • the support structure is attached to the light-emergent surface of the light guide plate by pasting the support structure on the light-emergent surface of the light guide plate.
  • a surface of the support structure facing away from the light guide plate is provided with a double-sided tape, the double-sided tape is configured to attach and fix the display panel.
  • the backlight module further includes a back plate, the back plate includes a bottom plate portion and a side plate portion, the bottom plate portion is arranged at a side of a bottom face of the light guide plate, the bottom surface facing away from the light-emergent surface; and the side plate portion is arranged around the light guide plate.
  • a reflector is arranged between the bottom plate portion and the bottom face of the light guide plate.
  • a display device includes a display panel and the backlight module, wherein an edge of the display panel is laminated on the support structure and is supported and fixed by the support structure.
  • FIG. 1 is a structural schematic view of a display device according to some embodiments of the present disclosure.
  • a backlight module and a display device are provided by the present disclosure, and through the backlight module and the display device provided in the present disclosure, an above-mentioned problem of the bright line under a large viewing angle may be addressed and a purpose of reducing a size of a bezel may be achieved.
  • a backlight module is provided in the present disclosure.
  • the backlight module is configured to provide a light source to a display panel 300 .
  • the backlight module includes: a light guide plate 100 including a light-emergent surface; an optical film 200 arranged at one side of the light-emergent surface of the light guide plate 100 ; and a support structure 400 arranged at the one side of the light-emergent surface of the light guide plate 100 , wherein the support structure 400 is configured to support and fix the display panel 300 .
  • the backlight module provided by the present disclosure has a simple structure and is easy to be assembled, and the support structure 400 arranged on the one side of the light-emergent surface of the light guide plate 100 supports the display panel 300 .
  • the support structure 400 supports the display panel 300 as a structure part and may replace a mold frame in a conventional backlight module, so that a size of a bezel is not affected by a thickness of the mold frame, and the purpose of reducing the size of the bezel of the backlight module may be achieved;
  • the support structure 400 since the support structure 400 is arranged on the side of the light-emergent surface of the light guide plate 100 and replaces the mold frame, the edge of the light guide plate 100 may be extended outwardly, as compared with the conventional backlight module, so that sizes of the light guide plate 100 and the active area (AA) may be increased.
  • the problem in the related art that the bright line under a large viewing angle caused by a too small distance between the edge of the light guide plate 100 and the edge of the active area in a
  • the support structure is implemented by using a support spacer.
  • the display panel is supported by arranging the support spacer on the light-emergent surface of the light guide plate 100 , so that the structure of the display panel is simple, and a manufacturing process of the display panel and an assembly method of the display panel are simple.
  • the support structure 400 may not be limited to a structure of the support spacer, and may be implemented in other manners.
  • the support structure 400 may also be implemented by arranging a support protrusion on the light-emergent surface of the light guide plate and at a region corresponding to a peripheral region outside the display region of the display panel.
  • the support protrusion may be integrally formed with the light guide plate. A specific implementation of the support structure will not be enumerated.
  • the edge of the light guide plate 100 at least partially extends beyond an edge of the optical film 200 , and the support structure 400 is arranged on a portion of the light guide plate 100 extended beyond the optical film 200 .
  • the edge of the light guide plate 100 extends outwards by a certain length
  • the support structure 400 is arranged on an extending portion of the light guide plate 100 , i.e., a portion of the light guide plate 100 that extends beyond the optical film 200 .
  • This structure is simple and easy to be assembled.
  • a conventional mold frame is replaced by the support structure 400 , and the size of the bezel may be reduced by at least 0.45 mm as compared with the backlight module in the related art.
  • the optical film 200 may also extend outwardly, and the support structure 400 may be arranged at the edge of the optical film 200 .
  • the support structure 400 is a plastic part made of a hard plastic.
  • the support spacer is a plastic spacer made of hard plastic.
  • the support structure 400 is made of hard plastic, which may ensure a reliability of supporting and fixing the display panel 300 .
  • the support structure 400 is a polyester resin part made of a polyester resin (PET) material.
  • PET polyester resin
  • a specific material of the support structure 400 is not limited.
  • the support structure 400 is a light shielding structure having a preset light transmittance.
  • the support structure 400 is arranged at the edge of the light-emergent surface of the light guide plate 100 . If the light transmittance of the support structure 400 is too large, a light leakage problem may occur. If the support structure 400 is a totally opaque shielding structure such as a black structure, then since the black may absorb light, the light will be lost. Therefore, the support structure 400 is the light shielding structure having the preset light transmittance.
  • the support structure 400 is a gray light-transmissible spacer.
  • the preset light transmittance of the support structure 400 is about 15%, which may play a role of reducing light appearing at the edge of the light guide plate 100 .
  • the support structure 400 is attached to the light-emergent surface of the light guide plate 100 by pasting the support structure 400 onto the light-emergent surface. In this way, the formed structure is simple and easy to be assembled. Of course, it should be understood that the manner in which the support structure 400 is fixed is not limited.
  • a surface of the support structure 400 facing away from the light guide plate 100 is provided with a double-sided tape 500 .
  • the double-sided tape 500 is configured to attach and fix the display panel 300 .
  • the display panel 300 is attached and fixed to the support structure 400 by using the double-sided tape 500 , and the formed structure is simple and easy to be assembled.
  • the edge of the light guide plate 100 may be arranged to cling to the side plate portion 602 of the back plate 600 , and there is no mold frame between the light guide plate 100 and the back plate 600 .
  • a display device is provided by the embodiments of the present disclosure and includes a display panel 300 and the backlight module according to the embodiments of the present disclosure, wherein an edge of the display panel 300 is laminated on the support structure 400 and is supported and fixed by the support structure 400 .

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
US16/339,889 2017-11-06 2018-10-18 Backlight module and display device Abandoned US20210364862A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201721466011.4U CN207336796U (zh) 2017-11-06 2017-11-06 背光模组及显示装置
CN201721466011.4 2017-11-06
PCT/CN2018/110742 WO2019085762A1 (zh) 2017-11-06 2018-10-18 背光模组及显示装置

Publications (1)

Publication Number Publication Date
US20210364862A1 true US20210364862A1 (en) 2021-11-25

Family

ID=62427344

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/339,889 Abandoned US20210364862A1 (en) 2017-11-06 2018-10-18 Backlight module and display device

Country Status (3)

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US (1) US20210364862A1 (zh)
CN (1) CN207336796U (zh)
WO (1) WO2019085762A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207336796U (zh) * 2017-11-06 2018-05-08 合肥京东方光电科技有限公司 背光模组及显示装置
CN110187542B (zh) * 2019-06-19 2024-03-26 武汉华星光电技术有限公司 一种液晶显示装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102368122A (zh) * 2011-09-14 2012-03-07 深圳市华星光电技术有限公司 液晶显示装置、液晶面板与背光模组的组合方法及结构
KR101960373B1 (ko) * 2012-03-29 2019-03-20 엘지디스플레이 주식회사 백라이트 어셈블리와 이를 이용한 액정 표시 장치
TW201508381A (zh) * 2013-08-26 2015-03-01 Wistron Corp 顯示裝置
CN103676233B (zh) * 2013-11-29 2016-08-17 业成光电（深圳）有限公司 液晶显示装置与使用该液晶显示装置的触控显示装置
CN204348262U (zh) * 2015-01-04 2015-05-20 京东方科技集团股份有限公司 一种显示装置及其框体组件
CN207336796U (zh) * 2017-11-06 2018-05-08 合肥京东方光电科技有限公司 背光模组及显示装置

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Publication number Publication date
CN207336796U (zh) 2018-05-08
WO2019085762A1 (zh) 2019-05-09

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AS Assignment

Owner name: BOE TECHNOLOGY GROUP CO., LTD., CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PARK, JINMOO;CHU, HANQI;REEL/FRAME:048805/0464

Effective date: 20190311

Owner name: HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PARK, JINMOO;CHU, HANQI;REEL/FRAME:048805/0464

Effective date: 20190311

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